linux/Documentation/devicetree/bindings/i2c/i2c-versatile.txt
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   1i2c Controller on ARM Versatile platform:
   2
   3Required properties:
   4- compatible : Must be "arm,versatile-i2c";
   5- reg
   6- #address-cells = <1>;
   7- #size-cells = <0>;
   8
   9Optional properties:
  10- Child nodes conforming to i2c bus binding
  11